Warning: enable_xinput is deprecated since 1.14.
Enables the use of the XInput extension if present on connected XServer and support built into Clutter.
This function does not do anything; XInput support is enabled by default in Clutter. Use the CLUTTER_DISABLE_XINPUT environment variable to disable XInput support and use Xlib core events instead.
XInput allows for multiple pointing devices to be used.
This function must be called before init.
Since XInput might not be supported by the X server, you might want to use has_xinput to see if support was enabled.